What’s a UTI?

A urinary tract infection, or UTI, is an infection in your urinary system, including the

bladder — the organ that collects and stores urine

urethra — the tube that carries urine from your bladder out of your body

There are two kinds of UTIs: cystitis and urethritis. Cystitis is an infection of the bladder. Urethritis is an infection of the urethra. If left untreated, either of these can spread and cause a kidney infection. So even though UTIs are really common, you’ve got to take them seriously.

What causes UTIs?

It’s pretty easy to get a urinary tract infection. Bacteria that live in the vagina, genital, and anal areas may enter the urethra, travel to the bladder, and cause an infection. This can happen during sexual activity when bacteria from your partner’s genitals, anus, fingers, or sex toys gets pushed into your urethra. UTIs can also be caused by chlamydia, gonorrhea, or other organisms.

Although UTIs aren’t spread from one person to another like STDs, having sex can lead to or worsen UTIs. But you don’t have to have sex to get a UTI. Anything that brings bacteria in contact with your urethra can cause a UTI.